Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
31 33 100 Replacing front left or right coil spring
Special tools required:
The coil spring is allocated in the Electronic Parts Catalogue (EPC) under the menu item "Spring table" after the vehicle identification number has been entered and the relevant optional equipment of the car has been selected.
All the safety precautions and instructions contained in the Owner's Handbook must be strictly observed!
Failure to observe these safety precautions and instructions increases the risk of serious physical injury, damage to your health and damage to property and equipment!
- Prior to each use, check the special tools for defects, modifications and operational reliability.
- Damaged/modified special tools must not be used!
- No changes or modifications may be made to the special tools!
- These special tools are intended solely for the purpose of tightening and relieving cylindrical and tapered suspension springs.
- Keep special tools dry, clean and (down to the spindle) free from grease.
- Impact screwdrivers are prohibited!
- Do not compress coil spring to full extent.
Installation note:
- All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
- Retaining elements on chassis and suspension and steering parts must be replaced.
Necessary preliminary tasks
- Remove FRONT SPRING STRUT .
Relieve tension on coil spring and remove from special tools 31 3 351 .
- The spring coil with the largest diameter must be positioned against the support bearing
- The upper coil spring end must be in contact with the limit position of the spring pad!
- Position the spring with mounted support bearing and gauge 83 30 2 210 780 in the spring tensioner so that the marks (1) are positioned vertically toward the top.
Position the gauge on the support bearing:
Right support bearing:
In vehicles to 04/2010, position mark "RIGHT A" on arrow at support bearing
In vehicles from 04/2010, position mark "RIGHT B" on arrow at support bearing
Left support bearing:
Position mark "LEFT" on arrow at support bearing
See also REPLACING SPRING STRUT!
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.